package itheima;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.function.Consumer;

public class HashSetDemo {
    public static void main(String[] args){
        ArrayList<String> list = new ArrayList<>();
        list.add("张三");
        list.add("张三");
        list.add("张三");
        list.add("张三");
        System.out.println(list);
        System.out.println(new HashSet<String>(list));

        //1.创建Hashset对象
        HashSet<String> hashSet = new HashSet<>();
        //2.保存数据
        hashSet.add("张琪");
        hashSet.add("尤科");
        hashSet.add("赵鑫");
        hashSet.add("张志");
        System.out.println(hashSet);
        //3.取数据（迭代器）
        Iterator<String> iterator = hashSet.iterator();
        while (iterator.hasNext()){
            String next = iterator.next();
            System.out.println(next);
        }
        //4.取数据(增强for循环)
        for (String name : hashSet){
            System.out.println("name="+name);
        }
        int [] arr={1,2,3,4,5,6,7,8,9,10};
        for (int i : arr){
            System.out.println(i);
        }
        //5.取数据（Lambda表达式）
        hashSet.forEach(new Consumer<String>() {
            @Override
            public void accept(String s) {
                System.out.println(s);
            }
        });
        hashSet.forEach(s-> System.out.println(s));

        hashSet.forEach(System.out::println);
        Student student = new Student("张三",28);

        //tostring
        System.out.println(student.toString());


    }
}
